12 GRINDING ZONES: There are 2 grinding zones with different abrasive sizes of the teeth strips, namely, the fine grinding zone and the polishing zone 2EASY TO USE: The strips open up the space between the teeth, and dental tools trips are easily inserted into the interdental space, which allows you to easily place the strip between the teeth without damaging the contacts. 3PROTECTION: The teeth polishing strips only one side are rough and the other are glossy, which effectively prevent the other teeth from dental damage. 4FLEXIBLE: Made of plastic material, safe and ordor free. Resistant to abrasion, tear resistant, soft, remain flexible and do not damage the gums. 5APPLICATION: Mainly used to correct and polish the restoration surface of all adjacent areas between teeth. Can also be used in the slicing step during tooth correction treatment.